Reliance General Insurance Complaint

We, Ashok & Reena Moda aged 60 & 54, own Reliance general Insurance individual medi claim policy since last 10 years and now we receive a notice from RGI saying that IRDA has discontinued this product hence we must migrate our existing policy to other products of RGI which actually cost us the premium more than double . There was no such condition in their original proposal.
So, sir, how IRDA can allow RGI to discontinue an existing policy or RGI can charge double the premium amount.
We are in big trouble and would like someone to help us before our policy expires.
Thanking you
Best regards
Ashok Moda